Re: Kernel hang with latest snapshot

[Li Guanglei <guanglei at cn dot ibm dot com>]

Li Guanglei wrote:
> David Boreham wrote:
> > I confirmed that a real machine crashes just as well a the vmware box,
> > but so far I don't have the serial cable hooked up to the machine.
> >  From the output that zipped off the top of the screen , the result
> > looked similar.
> >
> > I will gather some more crash logs and open a bug.
> David,
>
>   Could you tell me what probe points you turned on? I checked into CVS 
> yesterday some bugfix for scsi and ioscheduler probe points. Basically 
> it's a bad idea to visit members of a struct using pointers in embedded 
> c codes, so I change to visit these members in stap script because the 
> deref will perform runtime checking of invalid pointer access such as 
> null pointers. I use two machine connected with a serial line so that I 
> can capture the full oops text on another machine. I will test it again.
>
> - Guanglei
Sorry, I didn't see your reply when I was sending this out. I will 
take a look at iosyscall.open.entry, and will check the remaining 
codes of potential invalid pointer access. Thanks.

- Guanglei